Scientists are unsure how many cells exist in the human body; estimates range from 10 to 100 trillion. But you once existed as a single cell - for about half an hour.
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- 科学家现在并不确定人体内到底有多少个细胞;估计从10万亿-100万亿不等。但你曾经以一个微细胞的形式存在,时间大约为半小时。